Dr. Kerby received his doctoral degree in Clinical Psychology from the University of Southern Mississippi in Hattiesburg, Mississippi. During his graduate clinical training experience, he worked with a wide range of issues, including assessment and treatment planning for adolescents in the criminal justice system, therapy and relapse prevention for clients with psychotic disorders, and assessment for early intervention among pre-school children. He provided services to adults with intellectual disabilities, such as the design and delivery of a token economy system, and group home services designed to provide adults with the least restrictive environment. Dr. Kerby conducted program evaluation of early education programs, focusing both on academic and behavioral outcomes. He pursued studies in health psychology, and worked in the university sleep laboratory, conducting assessments and interpreting both behavioral and psychophysiological data.

Dr. Kerby completed a pre-doctoral internship at the University of Arizona Health Sciences in Tucson, Arizona. As part of his duties in his internship year, he delivered a number of clinical services, including addressing problems such as recurring major depression, panic attacks, social anxiety disorder, management of bipolar disorder, anger issues, eating disorders, and substance abuse. He completed a rotation in the sexual disorders clinic, where he conducted both individual and group therapy. Dr. Kerby worked in the sleep disorders clinic, applying stimulus control and other cognitive-behavioral methods to the promotion of sleep. He also completed rotations in neuropsychology and geropsychology.

Since obtaining his doctorate, Dr. Kerby has been interested in health psychology and health promotion, developing analytic techniques to assess multimorbidity and to report treatment outcome measures in ways that are intuitively meaningful to health providers and consumers. He has taught psychology at the graduate level, including courses in health psychology, geropsychology, clinical diagnosis, and methods and techniques in counseling. His therapeutic stance is cognitive-behavioral, and he works to establish a collaborative relationship with the goal of promoting psychological flexibility and valued living.